6533b861fe1ef96bd12c41f4
RESEARCH PRODUCT
EPR of radiation defects in LiBaF 3 crystals
V. OgorodnikUldis RogulisA. VeispalsI. Talesubject
Nuclear and High Energy PhysicsRadiationChemistryRadiationCondensed Matter PhysicsSpectral linelaw.inventionCrystalNuclear magnetic resonancelawGeneral Materials SciencePhysics::Atomic PhysicsAtomic physicsSpin (physics)AnisotropyElectron paramagnetic resonanceHyperfine structureLine (formation)description
EPR spectra of LiBaF 3 crystals have been investigated after X-irradiation at RT. A spectrum consisting of approximately 35 nearly equidistant EPR lines has a strong angular dependence on the line intensities. The spectrum is caused by a hyperfine interaction (hfs) of a spin S=1/2 with neighbouring groups of nuclei. The observed large number of hfs lines required Li nuclei being in the first shell and fluorine nuclei in the more distant second shell. We analysed the spectrum in the F-centre model, taking reduced hfs values of the F-centre in LiF and found qualitative explanation of the number of hfs lines. The angular dependence of the line intensities could be explained by an anisotropy of the g-tensor with its main axis along the [100] axis of the crystal.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-01-01 | Radiation Effects and Defects in Solids |